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NIST Atomic Spectra Database
Ionization Energies Data

Rn (all spectra)
86 Data Rows Found 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024). NIST Atomic Spectra Database (ver. 5.12), [Online]. Available: https://physics.nist.gov/asd [2026, October 26]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 Ionization  Energy 
 (cm-1) 
  86 692.5         
  (153 160)          
  [237 000]          
  (298 000)          
  (427 000)          
  (516 000)          
  (710 000)          
  (823 000)          
  (1 242 000)          
  (1 403 000)          
  (1 573 000)          
  (1 758 000)          
  (1 936 000)          
  (2 129 000)          
  (2 363 000)          
  (2 557 000)          
  (2 758 000)          
  (2 960 000)          
  (3 939 000)          
  (4 184 000)          
  (4 430 000)          
  (4 670 000)          
  (5 190 000)          
  (5 460 000)          
  (6 160 000)          
  (6 450 000)          
  (6 840 000)          
  (7 380 000)          
  (7 920 000)          
  (8 453 000)          
  (8 990 000)          
  (9 530 000)          
  (10 070 000)          
  (10 600 000)          
  (11 190 000)          
  (11 740 000)          
  (12 280 000)          
  (12 800 000)          
  (13 400 000)          
  (13 900 000)          
  (16 397 000)          
  (16 889 000)          
  (17 405 000)          
  (17 962 000)          
  (18 494 000)          
  (19 010 000)          
  (19 898 000)          
  (20 446 000)          
  (21 019 000)          
  (21 567 000)          
  (23 745 000)          
  (24 277 000)          
  (24 858 000)          
  (25 398 000)          
  (27 689 000)          
  (28 310 000)          
  (29 834 000)          
  [30 462 400]          
  (49 756 000)          
  (50 958 000)          
  (52 232 000)          
  (53 604 000)          
  (54 902 000)          
  (56 168 000)          
  (58 741 000)          
  (60 072 000)          
  (61 532 000)          
  (62 879 000)          
  (66 638 000)          
  (67 799 000)          
  (69 089 000)          
  (70 267 000)          
  (77 494 000)          
  (78 889 000)          
  (81 648 000)          
  (82 962 000)          
  (175 579 000)          
  (178 741 000)          
  (182 249 000)          
  (185 467 000)          
  (212 237 000)          
  (216 391 000)          
  (221 690 000)          
  (225 054 000)          
  (894 035 800)          
  (910 134 000)          
Notes:
a Uncertainty of the listed value is unknown.

If you did not find the data you need, please inform the ASD Team.

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